Effect of bio-functional MAO layers on the electrochemical behaviour of highly porous Ti

SURFACE & COATINGS TECHNOLOGY

卷:386

Article

Alves, A. C.¹  Costa, A., I¹  Toptan, F.^1,2,3  Alves, J. L.^1,2  Leonor, I^4,5  Ribeiro, E.^4,5  Reis, R. L.^4,5  Pinto, A. M. P.^1,2  Fernandes, J. C. S.^6,7 

[1] Univ Minho, CMEMS UMinho Ctr MicroElectroMech Syst, Guimaraes, Portugal

[2] Univ Minho, Dep Mech Engn, Guimaraes, Portugal

[3] UNESP, IBTN Br Brazilian Branch Inst Biomat Tribocorros, Av Eng Luiz Edmundo Carrijo Coube 14-01, BR-17033360 Bauru, SP, Brazil

[4] Univ Minho, 3Bs Res Grp Biomat Biodegradables & Biomimet, Guimaraes, Portugal

[5] Univ Minho, ICVS 3Bs PT Govt Assoc Lab, Braga, Guimaraes, Portugal

[6] Univ Lisbon, Dept Chem Engn, Inst Super Tecn, Lisbon, Portugal

[7] CQE Inst Super Tecn, Lisbon, Portugal

关键词: Powder metallurgy;    Porous Ti;    Micro-arc oxidation;    Corrosion;    EIS;   

DOI  :  10.1016/j.surfcoat.2020.125487

来源: Elsevier

【 摘 要 】

Ti foams are attractive for orthopaedic applications due to reduced Young's modulus and ability of bone ingrowth. However, poor corrosion behaviour and lack of bioactivity are yet to be overcome. In the present work, highly porous Ti samples were processed by powder metallurgy with space holder technique and bio-functionalized by micro-arc oxidation, resulting in nano/micro structured TiO2 surfaces containing bioactive elements. The electrochemical behaviour of these bio-functionalized highly porous Ti surfaces was evaluated through potentiodynamic polarization and EIS in physiological solution at body temperature. Results showed that bio-functionalization improved the corrosion behaviour of highly porous Ti. However, increased macro-porosity led to an increased corrosion rate.

【 授权许可】

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